Poisonous tablet and antidote.



J. A. BERGSTROM.

POISONOUS TABLET AND ANTIDOTE.

APPLICATION FILED NOV. 8, 1813.

Patented Oct. 6, 1914.-

WyITNESSES. v

UNITED srn rns PATENT OFFICE.

JOHN A. nrmesrnom, or rassarc. NEW JERSEY.

POISONOUS TABLET AND ANTIDOTE.

Specification of Letters Patent.

Patented Oct. 6, 1914.

Application flied November 8, 1913. Serial No; 799,894.

that persons using these tablets have accidentally swallowed a tabletand before the mistake was discovered the poison would be absorbed intothe system, with fatal consequences. v

It is the object of the invention to cover the tablet with a strongpowdered ingredientof sufiicient strength to neutralize the poison whentaken internally.

The antidote can be made to cover part or the entire outer surface ofthe tablet,

and when the tablet is em loyed for its proper purpose, the externacover can be readily removed. The in redient of the antidote cover maybe varie to suit the difl'erent poisons made up in tablet or pill form.For instance in the case of chlorid of mercury and its salts it would bepracticable to cover the tablet with a fine powdered gum albumen. In thecase of an acid or alkaline. poison the antidotes commonly known by themedical rofession viz: powdered magnesia,'pulver1zed soap or mustard canbe employed.

The drawmg herewith filed represents a' section of a tablet embodyingthis invention. In this drawing the letter a designates a tablet whichis commonly composed of bichlorid mercury This tablet is provided with acover or acket b consisting of a powdered substance such as gum, etc.--The ingredients of the cover are entirely separate rom the core of thetablet and when desired it can be removed. When the tablet is soldcommercially the cover adheres about the tablet and. cannot becomedisplaced therefrom.

It will be readily understood that the invention is designed toprimarily prevent the oison in the tablet when taken internally, rom murmg a person.

Tablets of this'kind' are usually employed for external application, butas stated above,

sometimesthe tablets are taken by accident for other medicine with fatalresults. When the tablet is taken accidentally thecoating or layer willdissolve by the action of the gastric juice and mix .with the poison inthe tablet thus forming a counteraction to render the poison harmless.-

I. claim i 1. A poison medicinal tablet, provided with a covercontainingan antidote.

2. A poison medicinal tablet, provided with a cover containing amucilaginous antidote.

3. A poison medicinal tablet provided with a cover containing avegetable antidote.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

JOHN A. BERGSTROM.

